White had a difficult choice at this point. This move is very natural, but capturing on c4 might be even more accurate.
8... c8g4 A good reaction, pinning the knight and exerting pressure on the center. 9. b1d2 The first choice of the computer. Gukesh was still following his preparation. The knight attacks c4 and also prepares to capture on f3. 9... c6c5 A surprising move, probably played in order to take Gukesh out of his preparation. 10. d4d5  10... e7e6 